Single-mode fiber optic cable specifications and models

Single-mode fiber optic cables feature a small core (~8–10 µm), support long-distance high-bandwidth transmission, and comply with ITU-T G.652 standards, with models like Corning SMF-28 and Draka SMF widely used.

Key Specifications

Core and Cladding: Single-mode fibers have a core diameter of approximately 8–10 µm and a cladding diameter of 125 µm, allowing light to propagate in a single mode, minimizing modal dispersion and enabling long-distance transmission up to 100 km without regeneration . Wavelengths: Standard operating wavelengths are 1310 nm and 1550 nm, with some fibers supporting the L-band (1565–1625 nm) for DWDM applications . Attenuation and Dispersion: Typical attenuation is very low, often below 0.4 dB/km at 1310 nm and 0.3 dB/km at 1550 nm. Chromatic dispersion is minimized, with zero-dispersion near 1310 nm, and mode field diameter is carefully controlled to ensure signal integrity . Standards Compliance:

• ITU-T G.652: Defines standard single-mode fibers, with G.652.D being the most versatile, supporting both current GPON networks and future DWDM systems .
• IEC 60793-2-50: Classifies fiber types and ensures quality.
• Telcordia GR-20-CORE, ANSI/ICEA S-87-640, RUS 7CFR 1755.900: Additional compliance for durability and performance . OS1/OS2 Classification: OS1 is optimized for indoor installations with tighter bend radii, while OS2 is designed for outdoor and long-haul applications, offering lower attenuation and higher bandwidth . Mechanical and Environmental Properties: Single-mode fibers are available in loose tube, tight-buffered, ribbon, and central tube constructions. Coatings like ColorLock™ enhance durability and identification, and fibers are designed to withstand harsh environmental conditions .

Common Models

Corning SMF-28 Series:

• SMF-28, SMF-28e, SMF-28e+, SMF-28e+ LL, and SMF-28 Ultra.
• SMF-28 Ultra is bend-insensitive with lower attenuation and backward compatible with previous versions . Draka Single-Mode Fiber:
• Supports 1310 nm, 1550 nm, and L-band operation.
• Enhanced with APVD™ manufacturing and ColorLock™ coating for high reliability and durability . Deployment Scenarios: Single-mode fibers are widely used in telecom backbones, data center interconnects, FTTH networks, metropolitan and long-haul links, and high-speed enterprise networks .

Summary

Single-mode fiber optic cables are ideal for long-distance, high-bandwidth applications due to their small core, low attenuation, and minimal dispersion. Compliance with ITU-T G.652 and related standards ensures interoperability and future-proofing. Popular models like Corning SMF-28 Ultra and Draka SMF provide reliable performance across diverse environments, supporting both current and next-generation optical networks.